SIE Sensorik SK1-15-M18-P-NB-S Capacitive Proximity Sensor

The SK1-15-M18-P-NB-S capacitive proximity sensor from SIE Sensorik is a cylindrical M18 device designed for non-contact detection of nearby materials. It uses a 2-wire interface and operates on a 10–35 V DC supply with a maximum current draw of 300 mA. Capacitive sensing enables detection of non-metallic targets such as plastics, glass, liquids, and powders without contact, making it suitable for presence sensing inside enclosures, level monitoring, and detecting objects through insulating barriers. The M18 housing and 10–35 V DC operation support compact mounting in automation panels and machinery, aligning with applications in packaging, automation, and material handling environments. Capacitance-based sensing works by detecting changes in the electrical capacitance between the sensor face and a nearby target, providing reliable proximity detection for a broad range of materials without physical contact.